In early May of 2005, Captain Tom Tighe and first mate, Loch Reidy, of the sailboat Almeisan welcomed three new crew members, two men and a woman, for a five-day voyage from Connecticut to Bermuda. While Tighe and Reidy had made the journey countless times, the rest of the crew were paying passengers learning about offshore sailing - and looking for adventure. Four days into their voyage, they got adventure but nothing that they had expected or had any training to handle.
A massive storm struck, sweeping Tighe and Reidy from the boat. The remaining crew members somehow managed to stay aboard the vessel as it was torn apart by wind and water. Overboard! follows the simultaneous desperate struggles of boat passengers and the captain and first mate fighting for their lives in the sea.